AS/NZS 61724.1:2020 pdf free.Photovoltaic system performance Part 1: Monitoring (IEC 61724-1:2017, MOD).
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
ISO 9060, Solar energy — Specification and classification of instruments for measuring hemispherical solar and direct solar radiation
Iso 9488. Solar energy — Vocabulary
ISO 9846, Solar energy — Calibration of a pyranometer using a pyrheliometer
ISO 9847, Solar energy — Calibration of field pyranometers by comparison to a reference pyranometer
WMO No. 8, Guide to meteorological instruments and methods of observation
ASTM G183, Standard Practice for Field Use of Pyranometers. Pyrheliometers and UV Radiometers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-131, IEC TS 61836, ISO 9488 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org!
• ISO Online browsing platform: available at http://www.iso.org!obp
3.1 sample
data acquired from a sensor or measuring device
3.2 sampling interval
time between samples
3.3 record
data recorded and stored in data log, based on acquired samples
3.4 recording interval time between records
3.5 re 0 it aggregate value based on series of records
3.6 reporting period
time between reports
3.15 In-plane diffuse irradlance GId
in-plane irradiance excluding the direct beam irradiance
Note 1 to entry: GId = G — Gb.
Note 2 to entry: Expressed in units of Wm2.
3.16 irradiation H
irradiance integrated over a specified time interval
Note 1 to entry: Expressed in units of kW•hm2.
3.17 standard test conditions STC
reference values of in-plane irradiance (1 000 W•m2), PV cell junction temperature (25 °C), and the reference spectral irradiance defined in IEC 60904-3
3.18 soiling ratio SR
ratio of the actual power output of the PV array under given soiling conditions to the power
that would be expected if the PV array were clean and free of soiling
3.19 soiling level SL
fractional power loss due to soiling, given by 1 — SR
3.20 active power P under periodic conditions, mean value, taken over one period, of the instantaneous product of current and voltage
Note 1 to entry: Under sinusoidal conditions, the active power is the real part of the complex power. Note 2 to entry: Expressed in units of W.
3.21 apparent power S
product of the r.m.s. voltage between the terminals of a two-terminal element or two-terminal circuit and the r.m.s. electric current in the element or circuit
Note 1 to entry: Under sinusoidal conditions, the apparent power is the modulus of the complex power. Note 2 to entry: Expressed in units of VA.AS/NZS 61724.1 pdf download.